EP0152775A2 - Base d'injection pour un moteur Diesel - Google Patents

Base d'injection pour un moteur Diesel Download PDF

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Publication number
EP0152775A2
EP0152775A2 EP85100554A EP85100554A EP0152775A2 EP 0152775 A2 EP0152775 A2 EP 0152775A2 EP 85100554 A EP85100554 A EP 85100554A EP 85100554 A EP85100554 A EP 85100554A EP 0152775 A2 EP0152775 A2 EP 0152775A2
Authority
EP
European Patent Office
Prior art keywords
spray holes
injection
combustion chamber
jet
spray
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP85100554A
Other languages
German (de)
English (en)
Other versions
EP0152775A3 (fr
Inventor
Herbert Dipl.-Ing. Wiegand
Klaus Dipl.-Ing. Bäumer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Deutsches Zentrum fuer Luft und Raumfahrt eV
Original Assignee
Deutsches Zentrum fuer Luft und Raumfahrt eV
Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Deutsches Zentrum fuer Luft und Raumfahrt eV, Deutsche Forschungs und Versuchsanstalt fuer Luft und Raumfahrt eV DFVLR filed Critical Deutsches Zentrum fuer Luft und Raumfahrt eV
Publication of EP0152775A2 publication Critical patent/EP0152775A2/fr
Publication of EP0152775A3 publication Critical patent/EP0152775A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/1813—Discharge orifices having different orientations with respect to valve member direction of movement, e.g. orientations being such that fuel jets emerging from discharge orifices collide with each other
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B23/00—Other engines characterised by special shape or construction of combustion chambers to improve operation
    • F02B23/02—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition
    • F02B23/06—Other engines characterised by special shape or construction of combustion chambers to improve operation with compression ignition the combustion space being arranged in working piston
    • F02B23/0645—Details related to the fuel injector or the fuel spray
    • F02B23/0663—Details related to the fuel injector or the fuel spray having multiple injectors per combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for
    • F02M61/1806—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for characterised by the arrangement of discharge orifices, e.g. orientation or size
    • F02M61/182—Discharge orifices being situated in different transversal planes with respect to valve member direction of movement
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B2275/00—Other engines, components or details, not provided for in other groups of this subclass
    • F02B2275/14—Direct injection into combustion chamber
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
    • F02B3/00—Engines characterised by air compression and subsequent fuel addition
    • F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a jet injection device for a diesel engine, in particular with direct injection, with at least one nozzle body protruding into a combustion chamber, which has a channel which can be blocked and released by a controllably movable nozzle needle, and with at least two spray holes, the liquid jets of which unite in the combustion chamber.
  • the fuel is injected under high pressure into the combustion chamber, which contains the previously compressed and therefore highly heated air charge.
  • the injection is carried out through single and multi-hole nozzles.
  • the mixture formation can be supported by additional air movement, which is achieved by special shaping of the combustion chamber. It has been shown that the exchange of momentum and matter between Air and fuel are mainly involved in the jet tip of the fuel jet. The result of this is that the mixing cannot be improved by simply increasing the injection pressure.
  • the spray holes on the nozzle body are arranged in pairs and the spray holes of a pair are so close together that the fuel injected by them appears or acts as a common fuel jet.
  • the directions and dimensions of the injection holes can be changed slightly with respect to one another, so that the injection directions have a small angle difference with respect to one another.
  • a common injection jet is generated by two injection holes.
  • the invention has for its object to provide a jet injection device of the type mentioned, which improves the combustion in the diesel engine by a continuous, faster and more thorough mixing of air and fuel.
  • the spray holes are inclined or directed towards one another in such a way that the liquid jets emerging from them, forming a stowage surface, collide with one another.
  • the injection jets emerging from two spray holes from one or two nozzle bodies are guided such that they collide with one another at a predetermined distance from the spray holes and form a storage area. This ensures continuous, faster and better utilization of the beam pulse. In this case, even when using two nozzle bodies, the fuel supply from the injection pump takes place via a common injection line.
  • the invention is not limited to jet injection devices with two spray holes, but the nozzle body can also be provided with a plurality of spray holes which are assigned to one another in pairs, so that the injection jets emerging from the spray holes form free storage areas in different levels of the combustion chamber and thereby promote the formation of a stratified charge.
  • one of the spray holes which are assigned to one another in pairs, has a spray hole connected to the combustion chamber via a slot nozzle (P 32 41 679.2). It is thereby achieved that the fuel jet emerging from this spray hole draws compressed and heated air out of the combustion chamber, so that so much energy is drawn from this injected jet by the sucked-in air that the jet becomes "softer". As a result, a particularly favorable type of mixture formation is achieved when the "hard jet” strikes the "soft jet”.
  • suitable training and dimensioning of the ejector Slit nozzle can be supplied to the "soft jet” so much air that the fuel evaporating from this jet spatially targeted ignition in the dead water area of the "hard jet”.
  • the "hard jet” acts as a flame holder until shortly before the end of the injection, so that this measure can be used to influence the location of the combustion, which is important for reducing the formation of pollutants, in particular of NO.
  • the NO x formation can, among other things, be proven to be reduced either by avoiding excessively high gas temperatures or by keeping the residence time of the fuel gases very short at high temperatures.
  • the injection device consists of the nozzle body 10, which tapers towards its front end and has the spray holes 11 and 12 at this front end.
  • Located in the nozzle body 10 is the longitudinally displaceable nozzle needle 13, the front tip 14 of which, in the closed state, presses against a seat 15 in the front region 16 'of the fuel channel 16 and thereby closes the fuel channel 16.
  • the Fuel channel 16 has a rear section 16 ′′, which runs laterally next to the bore for the nozzle needle 13 and, when the nozzle needle 13 is withdrawn, is connected to the section 16 ′.
  • the arrangement of the spray holes 11 and 12 is chosen so that the injection jets emerging from them meet at a predetermined distance in front of the nozzle body 10 in the combustion chamber 17 in a free storage area 18.
  • the jet injection device is not limited to two spray holes 11 and 12 assigned to one another in pairs. Rather, several spray holes 11 and 12 (not shown) assigned to one another in pairs can be accommodated in the nozzle body 10 in such a way that the injection jets meet in different planes 18 in the combustion chamber 17 due to different injection angles. As shown in FIG. 2, in the present exemplary embodiment, three pairs of one spray hole 11 for a “hard jet” and one spray hole 12 for a “soft jet” along an imaginary one Circle arranged on the tip of the nozzle body.
  • two nozzle bodies 10 are used, as shown in FIG. 3, these can be arranged in the combustion chamber 17 in such a way that the injection jets emerging from the spray holes 11 and 12 meet axially, which causes a particularly intensive accumulation effect of the colliding fuel jets.
  • the suction slot 19 in the spray hole 12 can be omitted if the entire exit pulse of the two axially encountered injection jets is to be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Fuel-Injection Apparatus (AREA)
  • Combustion Methods Of Internal-Combustion Engines (AREA)
EP85100554A 1984-02-18 1985-01-19 Base d'injection pour un moteur Diesel Withdrawn EP0152775A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3405866 1984-02-18
DE19843405866 DE3405866A1 (de) 1984-02-18 1984-02-18 Staustrahleinspritzvorrichtung, insbesondere bei direkteinspritzendenden dieselmotoren

Publications (2)

Publication Number Publication Date
EP0152775A2 true EP0152775A2 (fr) 1985-08-28
EP0152775A3 EP0152775A3 (fr) 1985-10-02

Family

ID=6228114

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85100554A Withdrawn EP0152775A3 (fr) 1984-02-18 1985-01-19 Base d'injection pour un moteur Diesel

Country Status (4)

Country Link
EP (1) EP0152775A3 (fr)
JP (1) JPS60190661A (fr)
DE (1) DE3405866A1 (fr)
DK (1) DK71785A (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2895465A3 (fr) * 2005-12-22 2007-06-29 Renault Sas Buse d'injecteur pour injection directe
EP2923068A4 (fr) * 2012-11-20 2016-04-20 Nostrum Energy Pte Ltd Atomiseur injecteur de liquides, à jets en collision

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0583366U (ja) * 1992-04-21 1993-11-12 本田技研工業株式会社 燃料噴射弁

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR471494A (fr) * 1913-05-16 1914-10-29 Steijaard Et Jannette Walen So Dispositif de pulvérisation pour moteurs à combustion interne
GB220344A (en) * 1923-04-12 1924-08-12 Otto August Banner Improvements in the combustion chambers and fuel injection arrangements of internal combustion engines
DE476846C (de) * 1923-08-29 1929-05-29 Motorenfabrik Deutz Akt Ges Brennraum fuer kompressorlose Dieselmotoren
CH489708A (de) * 1968-04-11 1970-04-30 Sulzer Ag Brennstoffdüse eines Brennstoffeinspritzventiles für eine Kolbenbrennkraftmaschine
FR2399551A1 (fr) * 1977-08-04 1979-03-02 Alfa Romeo Spa Injecteur d'essence pour moteurs a explosion
GB2087481A (en) * 1980-11-19 1982-05-26 Lucas Industries Ltd I.C. engine fuel injection nozzle
DE3241679A1 (de) * 1982-11-11 1984-05-17 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Einspritzeinrichtung, insbesondere bei direkteinspritzenden dieselmotoren

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL6405367A (fr) * 1964-05-14 1965-11-15
DE2610927C2 (de) * 1976-03-16 1983-01-27 Institut für Motorenbau Prof. Huber e.V., 8000 München Einspritzdüse zur Kraftstoffeinspritzung in den Brennraum einer Brennkraftmaschine
JPS5810398Y2 (ja) * 1978-07-14 1983-02-25 松下電器産業株式会社 シ−ルドケ−ス
JPS5625566A (en) * 1979-08-03 1981-03-11 Kanbara Kiyoshi Fireproof outer wall material

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR471494A (fr) * 1913-05-16 1914-10-29 Steijaard Et Jannette Walen So Dispositif de pulvérisation pour moteurs à combustion interne
GB220344A (en) * 1923-04-12 1924-08-12 Otto August Banner Improvements in the combustion chambers and fuel injection arrangements of internal combustion engines
DE476846C (de) * 1923-08-29 1929-05-29 Motorenfabrik Deutz Akt Ges Brennraum fuer kompressorlose Dieselmotoren
CH489708A (de) * 1968-04-11 1970-04-30 Sulzer Ag Brennstoffdüse eines Brennstoffeinspritzventiles für eine Kolbenbrennkraftmaschine
FR2399551A1 (fr) * 1977-08-04 1979-03-02 Alfa Romeo Spa Injecteur d'essence pour moteurs a explosion
GB2087481A (en) * 1980-11-19 1982-05-26 Lucas Industries Ltd I.C. engine fuel injection nozzle
DE3241679A1 (de) * 1982-11-11 1984-05-17 Deutsche Forschungs- und Versuchsanstalt für Luft- und Raumfahrt e.V., 5000 Köln Einspritzeinrichtung, insbesondere bei direkteinspritzenden dieselmotoren

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2895465A3 (fr) * 2005-12-22 2007-06-29 Renault Sas Buse d'injecteur pour injection directe
EP2923068A4 (fr) * 2012-11-20 2016-04-20 Nostrum Energy Pte Ltd Atomiseur injecteur de liquides, à jets en collision
US10502171B2 (en) 2012-11-20 2019-12-10 Nostrum Energy Pte. Ltd. Liquid injector atomizer with colliding jets

Also Published As

Publication number Publication date
DE3405866A1 (de) 1985-08-22
EP0152775A3 (fr) 1985-10-02
DK71785A (da) 1985-08-19
JPS60190661A (ja) 1985-09-28
DK71785D0 (da) 1985-02-15

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Inventor name: WIEGAND, HERBERT, DIPL.-ING.

Inventor name: BAEUMER, KLAUS, DIPL.-ING.